Sanitation would be the biggest one. For example, all food being stored in clean places at the proper temperatures.
American sign lanuguage is good because it help communicate with others if you have any type of disorder. It also can be bad because if the person is misunderstood you wouldnt be able to fix it, for they will be misunderstood again.
<span>Edgar Allan Poe's view on poetry is that all poems must be a "rhythmical creation of beauty". In his eyes, melancholy and sadness is beautiful. He thinks that the death of a young beautiful woman is itself full of beauty. I hope this helps.</span>